Editor's note: This article was first published on Jan. 9, 2025. It was updated on Jan. 14 and Feb. 5 to reflect the latest information.

Wildfires tore through the Los Angeles area this January, displacing tens of thousands of people and claiming at least 29 lives as of Feb. 4. The Palisades fire — the first to erupt — engulfed over 23,000 acres and devastated surrounding communities. Four weeks later, both the Palisades and Eaton fires are now fully contained. But they rank among the deadliest and most destructive fires in California history.

While California is no stranger to summer wildfires, this January outbreak was an extreme outlier, fueled by unusually severe fire weather conditions across the state's southern region. It will take time to unravel the many factors contributing to the situation. Yet it is a stark reminder that climate change is making wildfires more frequent, intense and destructive than ever before — with individual lives, homes and businesses paying the price.

Data on WRI's Global Forest Watch platform shows just how uncommon these fires were, and how fire trends are changing as the planet warms.

Map showing fire alerts in Los Angeles County as of Feb. 4, 2025.

Large Wildfires Are Rare in California this Early in the Year

Fire alerts, which use satellite data to detect fires based on the heat they generate, rose quickly as fires spread across Los Angeles County. Over 200 fire alerts were detected in the area between Jan. 7 and Jan. 22 — more than 130 times the average for the first four weeks of the year from 2012-2024. (No new high confidence fire alerts were detected between Jan. 22 and Feb. 4.)

During most years, no fire alerts are detected in Los Angeles in the first three months of the year, let alone the first few weeks. Only one other year, 2021, had more than 10 fire alerts in Los Angeles between January and March. That year went on to become one of California's most devastating for wildfires.

Graphic showing over 200 fire alerts in Los Angeles between January and February 2025.

In California, wildfire season typically starts in June and continues through October, when the weather is hot and dry. Weather conditions change toward the end of the year, bringing rainfall to much of the state. Cool temperatures and rain during the winter months typically keep wildfire activity low.

This year, the rain came late in Los Angeles. Following a summer of record-breaking temperatures and extreme heat, rainfall between October and January was far below normal for the time of year: only about 4% of the typical amount. This lack of rainfall, combined with strong and dry Santa Ana winds, created the right conditions for a surge in fire activity.

Fire Activity Is on the Rise in California

While these early season fires are rare, forest fires in general have become increasingly devastating for Californians over the past two decades, threatening lives and communities from Napa County in the north to San Diego in the south.

Fire is, on average, the largest driver of tree cover loss in the state. In 2020 and 2021, California lost a record amount of tree cover to fire: over 700,000 hectares (1.73 million acres), or more than 5 times the area of Los Angeles. These wildfires had catastrophic impacts; claiming lives, creating hazardous air quality, ravaging ecosystems and causing billions of dollars in property damage.

What's Fanning the Flames?

The increasing frequency and intensity of wildfires in California can be attributed to both natural and human-induced factors, with climate change playing a central role. Rising global temperatures have created hotter, drier conditions across the landscape. This makes fires not only more likely to ignite but also easier to spread. The hottest years on record globally — 2023 and 2024 — have seen extreme heat intensify droughts and dry out vegetation, creating an ideal fuel source for wildfires.

Indeed, one recent study estimated that climate change made L.A.'s January fires 35% more likely to occur.

Southern California is also frequently affected by the Santa Ana winds, which bring strong, dry gusts that further fuel the fires and make containment difficult. This combination of heat, dryness and wind is compounded by the fact that communities are increasingly being built near vegetated areas (known as the "wildland-urban interface"), putting both people and their built environment at greater risk. As average temperatures in California continue to rise, so does its vulnerability to catastrophic fires.

Increasing Wildfires Are Both a Local and Global Challenge

The increasing size and severity of wildfires in California is not an isolated event. Climate change is making wildfires more frequent and intense around the globe, resulting in larger forest fires worldwide. Hot and dry weather conditions brought on by climate change result in longer and more severe fire seasons and make bigger areas more prone to wildfires.

With each fraction of a degree of warming, the risk of wildfires significantly increases. As one of the primary risk factors associated with wildfires, it is critical that countries work together to reduce carbon emissions and keep global temperatures below the threshold set by the Paris Climate Agreement.

Meanwhile, communities on the frontlines don't have to wait for a global climate response. There are steps they can take now to reduce wildfire risks and protect residents, such as restoring degraded forests and using controlled burns and other strategies to reduce fire fuel.

New models to pay for these activities are emerging across the U.S. In California, Forest Resilience Bonds developed by Blue Forest and WRI raised $29 million for restoration and wildfire risk reduction across 63,000 acres in the Sierra Nevada mountains. Expanding such approaches in the U.S. and elsewhere can play an important role in safeguarding communities, homes and businesses from the growing threat of wildfires.

While it is too early to tell how bad 2025 will be for wildfires, we know which direction long-term trends are headed. Taking steps to protect communities and curb climate change cannot wait.

To view historical fire trends, track fire activity in 2025 and sign up to receive fire alert notifications, visit the Global Forest Watch map and platform.